Seminole County, FL Shrink-Swell Risk

What Seminole County, FL's soil means for a foundation

Low

USDA's SSURGO data puts Seminole County, FL's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 1.57% across 92.1% of the county's surveyed land. That's the easiest starting point on this site's scale - a standard foundation is the reasonable default here, though any one lot can still differ.

This is a county figure, not a lot figure

USDA's survey covers the whole of Seminole County, FL at once, not any single address. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Seminole County will actually do.

Report cost vs. repair cost

With Seminole County, FL rating "Low", a geotechnical report is still worthwhile before a build, just less urgent than in a high-risk county. A geotechnical report runs $1,000-$5,000, typically around $2,700. Foundation repair, if a specific lot turns out to differ from the county average, runs $5,000-$15,000.

Where this sits nationally

Nationally, Seminole County, FL is the 2,407-most-constrained of 3,085 rated counties for shrink-swell soil. Within Florida alone it ranks 5 of 66. Seminole County covers 309 square miles and counts 494,605 residents.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Bosque County, TX and Renville County, ND are worth a look for comparison.

How this reading is built, and its real limits · Moisture management: the cheap fix that works on any soil

More of Florida

Every county in Florida is on this site, including Madison County, FL and Sarasota County, FL. The full underlying dataset is downloadable directly, one row per county.